“I just remember Jimmy was everything to me.”

Katharine Hepburn in costume as Tracy Lord for the Broadway production of The Philadelphia Story, 1939
It was time to do the scene, and Cary said, “George, why don’t we just go ahead? If you don’t like it, we’ll do it again.” So, without a rehearsal or anything, we started the scene. As I was talking, it hit me that I’d had too much to drink. So, as I explained things to Cary, I hiccuped. In answer to the hiccup, Cary said — out of the clear blue sky — “Excuse me.” Well, I sort of said, “Ummm?” It was very difficult for me to keep a straight face, because his ad-libbed response had been so beautifully done … Cary had an almost perfect humor.
Jimmy Stewart on Cary Grant while filming ‘The Philadelphia Story’